Lock joint



Nov; 14, 1944.

A J. JANSEN LOCK JOINT Filed June 21, 1943 INVENTOR 12277027 ../7 50550 ATTORNEY whichiit. is :desired to: assemble quickly withizpre where an :outsideiflushsseam withcconcealedi i-vet headsis'esSentiaLias forrzstreamlining.1:; A: froinr-rthe structures subjectedt-storthe lrigors'rofaweather s01 culiar structure of which at least partiallyze-lim1 I arrangement of part without departing from the sp Thisszinventionurelatesstorzagflush-seam OCK-ELL- vieweof. avniodificzition of the:.meansiforhrivetingras; Jvointzforlmetalzorothemplates: a. '1 togetherlthezt'wamembersnf the iointcl Infithfi cconstruction:mirairiplanesi, -:=ships', .pre: Referringito. Figs: -1; 2,1 an'ds3-J of "the drawing fabricated ibuildingsa and: many; otherlzstructure the jQiYltnBIIlbOdl-Bdf by. -.m ?.invention;i.and which i .may be produced preferably by .an:1-.extrusio w cision, and withisthesleastslaborgttheeperation f processjeonsistsiof platezsectionszm and 15].? .Th riveting is .obwiouslystimesconsumingand; expen platedzfl deformed. along ltSedgeatO beijoinedawit sive, whilet prcjectiomerivetrheads interfere withzrql. a thickenedcportioni;having':a gIOQVBnIZ formed. streamlining: .1. '3' I thereinptheltopzflanged3:05@whichgroove iscone lnmyri'mprovedgjointeas butoneenembenthereg-r =tinuonsewithsxandvlies.rinthe-.samezplane as "sai of isudrillednfonrivetsiandaattheafaetorymvhen plateg while stheabottom :fiange'zilh thereof: lie it is @producedmerromin drilling .is-:avoided-;1.and; lg parallelrwitlriabutzthevnedgezofcwhich :is slightly: I no ip'rohlenrrof'rgistering'rivetzholesiimone mema undercwt zin back afof the 'zplanerofsthe sedge .o

bemawlthl thoi'sei. inrr'anotheraexisitsns .Themrivets; flange::l3;;saidiflangefl4:.beingapunchedor dri-lledc'i. moreover;=mayrbelinsertediin placeain one menu. at regular spaced intervals WithihOlBsJjmzInz the 2.: bemofscheajointizatutherfactoryu and: as fthestwo process of producing plate 10, the bottom: nan e j p 1 l4 assfirst .formedfsturnedwdowrrratanangleitoi for longitudinal sliding engagementtcassemblh a flange- 313 lsufilcientzto permitmof .the'irinsertion':a.. I bOth rapidgpreciseg .andreasily i'acco'ms downwardly rtherethrough in:' each hole: 1- 5 of a. .1 a:Mynmpmvedilockejointiis=highlysprace ;rivet:1 ;l,6, ea'flter. whichczoperationl. the: flanges-14 2i" easerofldamaeetwaf arh Ofifi strnctllrefin is bent-,nbyn-any; suitablecmeans,ziupwardauntil h-iehaitsisi usedy; asarepairstsmaylquicklylbesie attains-r; the -'position ='.;:parallel:.,withflanges; l3, fectedhb'y removal: ofhdamagedcsectionse and er shown in'Figs -l. andct'he'vrivets' arethus:;retained placement bynewisectionsm; 3 l in place.against;dislodgementnpendingreassembly?1 Withhtheseandmther advantages-.myiewcone ;;-o'f thezioinfaa-v f 1 objectt ofnmyrinventionzzis 10 provdeh'a' jointrjfor l" Themthe :plat'e 11H 5 is :formedvxalongcits.xedgew' inetalgs'orl other plates; forz'i-useeinipanyxstructure to bezjoinedwith azthickened portion-rdomprising a proj-ectingitongue 5| 1 .offsetwa .sufilcientdistance latessurfacevso. as. to :lie .oppositerthe 1- provide a:-j.oint-. wh-iclzcw-ill .2 1 grooves- :=v'vhenethe;two aplatesul0;? ll fieiinqtheV'In same;::plane;:;:and. :with ishoulders'gl 8.; al 9 corre-;

spondingeriopppsitely;withzand adapted-r to: abut c j, theizflangeswslhll respectively;;when: the joint-is .1. zg mhe bjeetiisitypmwidezaiointntheepe' assembled. The tongue I! has "formed in:-;-its rm underjiside -a: longitudinal: channeling :arcuate gin; natestheneed for strengthenin ribs in the struccrossesectionmand egcorrcsponding .sg lyz w-.1 ture in which it is used. v shape to a cross-section of the head of rivet l6. With these and other objects in view, the in Continuous with the under surface of tongue I1, vention consists in the novel construction and projecting inwardly into and extending lengths hereinafter described, ilwisely of said channel 20 on opposite sides thereof drawing, and parare ledges 2|, 22 separated from each other by a ban the diameter ofthe Arrotheriobject be highly liresistant;rtesicorro'siomiwheneused einfi of thez ceanz lustrated in the accompanying ticularly pointed out in the appended claims, it space slightly greater t being understood that various changes in-the rivets (I6) shank. 7 form and constructional details may be made -Referring to Fig. 4, the modified riveting means Hit of the inventhere shown (and which has the identical function or sacrificing any of the advantages thereof. tion of rivets l6 shown in the other figures, com- In this drawing: prises a metal strip, half-round in cross-section, Fig. 1 is an enlarged fragmentary perspective which constitutes a common head 23 for rivet f the assembled joint; shanks 24, integral therewith.

perspective In assembling the joint, the plates l0, H being view of one member of the joint; adapted for slidable engagement with each other. Fig. 3 is an enlarged fragmentary perspective 7 (as indicated by arrows in Fig. 1, tongue I1 slidview of theother member of the joint, before the I ing lengthwisely in groove 12), the ends of rivets insertion of rivets therein; and I Fig. 4 is an enlarged fragmentary perspective flat surface to raise an view, in cross-section, 0

Fig. 2 is an enlarged fragmentary l6 inserted in holes l5 are rested upon a suitable d align their heads in an even row so as to be successively received by the channel 20 and their shanks to be received by the space between ledges 2!, 22 as the plates In, H are slid into locked engagement. To permanently lock the joint, heads are formed on the ends of rivets l6, by riveting in the usual manner (see rivet I6 shown in cross-section, Fig, 1), but as their heads are supported in channel 20, no bucking of the rivets is required.

It is obvious that bolts and nuts may be used in place of rivets, where portable, or collapsible, or alterable structures are to be constructed, in which case means, such as the modification shownjn Fig. 4 at 23, may be provided so as to prevent turning of the threaded bolts as the nuts thereon are tightened down.

It is also obvious that greater strength and/or watertight character may be imparted by blowing into my improved joint under pressure material adapted to subsequent; hardening, caulking material, or by sweating. It will be evident from this that a point constructed according to my invention is particularly adapted to resist corrosion, the rivets bein concealed and remote from the outside seam.

Although the drawing and the above specification disclose the best mode in which I have contemplated embodying my invention, I desire to be in no way limited to the details of such disclosure, for, in the further practical application of my invention, many changes in form and in constructional details may be made as circumstances require or experience suggests without departing from the spirit of the invention within the scope of the appended claims.

I claim:

1. In a joint for metal or other plates, a plate section having a thickened edge formed with a groove therein, the top groove flange being continuous with and in the same plane as the upper surface of the plate and the bottom groove flange lying parallel to said surface and having holes formed therein at spaced intervals along its length, a second plate having a thickened edge, a tongue projecting from said edge opposite said groove when the two plates lie in the same plane, shoulders above and below said tongue corresponding to and adapted to abut said groove flanges, said tongue having a channel formed lengthwisely in its under surface; ledges continuous with the under surface of said tongue and projecting into said channel from opposite sides thereof, and fastening means in said holes and channel.

2. In a joint for metal orother plates, a plate section having a thickened edge formed with a groove therein, the bottom flange of which groove has holes formed therein at spaced intervals along its length, a second plate having a thickened edge, a ton ue projecting from said edge opposite said groove, shoulders above and below said tongue adapted to abut thetwo flanges of said groove, said tongue having a channel formed lengthwisely in its under surface, ledges in said channel on opposite sides thereof, and rivets in said holes adapted to grip the upper surface of said ledges and the lower surface of the bottom flange of the groove.

3. In a joint for metal or other plates, a .plate section having a thickened edge formed with a groove therein, the edge of the bottom flange of which groove is undercut in back of the plane of the edge of the top flange thereof, said bottom flange having holes formed therein at spaced intervals along its length, a second plate having a thickened edge and a tongue projecting therefrom opposite said groove, said tongue havin a channel formed in its under surface lengthwisely thereof, ledges in said channel on opposite sides thereof, shoulders above and below said tongue adapted to abut the two flanges of said groove, and rivets in said holes and channel.

4'. In a joint for metal or other plates, a plate section having a thickened edge formed with a groove therein, the bottom flange of which has holes formed therein, a second plate having a thickened edge and a tongue projecting therefrom opposite said groove, said tongue having a channel arcuate in cross-sectionv formed in its under surface lengthwisely thereof, ledges in said channel on opposite sides thereof,- shoulders I formed above and below said tongue adapted to abut the two flanges of said groove, and rivets in said holes and channel.

5. In a lock-joint for metal or other plates, a plate section having a thickened edge and a groove formed therein, the top flange of which is continuous with and lies in the same plane as the upper surface of the plate and the bottom flange of which groove has holes formed therein at spaced intervals along its length, a second plate with a thickened edge and a tongue projectingtherefrom opposite said groove, said tongue having shoulders above and below it abutting the two flanges of said groove and a channel formed in its under surface lengthwisely thereof, with ledges projecting into said channel formed on opposite sides thereof, and a series of rivets having a common head in the form of a strip in said channel and the shanks of which extend through said holes.

ASTRID J. JANSEN. 

